/*
 * Copyright (c) 2002-2009 Moxie Marlinspike
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */


#include "HttpConnectionManager.hpp"

#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>

#include <iostream>
#include <string>
#include <map>

#include "../util/Destination.hpp"
#include "../util/Util.hpp"
#include "../FingerprintManager.hpp"
#include "../FirefoxUpdater.hpp"
#include "../UpdateManager.hpp"

// Public

using namespace boost::asio;

HttpConnectionManager::HttpConnectionManager(io_service& io_service, int port,
        CertificateManager &certificateManager,
        bool denyOCSP)
	: acceptor_(io_service, ip::tcp::endpoint(ip::tcp::v4(), port)),
	  port_(port),
	  certificateManager(certificateManager),
	  denyOCSP(denyOCSP)
{
	if (port != -1)
		acceptIncomingConnection();

}

void HttpConnectionManager::acceptIncomingConnection()
{
	boost::shared_ptr<ip::tcp::socket> socket(new ip::tcp::socket(acceptor_.io_service()));

	acceptor_.async_accept(*socket, boost::bind(&HttpConnectionManager::handleClientConnection,
	                       this, socket, placeholders::error));

}

void HttpConnectionManager::bridgeHttpRequest(boost::shared_ptr<ip::tcp::socket> socket,
        ip::tcp::endpoint destination)
{
	Bridge::ptr bridge = HttpBridge::create(socket, acceptor_.io_service(),
	                                        FingerprintManager::getInstance());

	bridge->getServerSocket().
	async_connect(destination, boost::bind(&HttpConnectionManager::handleServerConnection,
	                                       this, bridge, placeholders::error));
}

void HttpConnectionManager::handleClientConnection(boost::shared_ptr<ip::tcp::socket> socket,
        const boost::system::error_code& error)
{
	if (error)
	{
		socket->close();
		Logger::logError("HTTP Accept Error...");
		return;
	}

	try
	{
		ip::tcp::endpoint destination;
		Destination::getOriginalDestination(*socket, destination);

		if (denyOCSP && certificateManager.isOCSPAddress(destination))
			OCSPDenier::getInstance()->denyOCSPRequest(socket);
		else
			bridgeHttpRequest(socket, destination);

	}
	catch (IndeterminateDestinationException &exception)
	{
		std::cerr << "Error: Could not determine original destination..." << std::endl;
	}

	acceptIncomingConnection();
}

void HttpConnectionManager::handleServerConnection(Bridge::ptr bridge,
        const boost::system::error_code& error)
{
	if (!error)
	{
		bridge->shuttle();
	}
	else
	{
		Logger::logError("HTTP Connect Error");
		bridge->close();
	}
}

